Dinosaur music / lighting function, start switch,  

As the dinosaurs moved forward,   their claws, Mouth & Egg hatching moves at the same time,  

Electric sound and light T-Rex dinosaur  

Easy to Install and Play: Only need to put 3 AA batteries in the battery case and install the wings and tail by hand, fill the water in head, then turn on the power button.5.Attention: For boys and girls ages 3+. 3 AA Batteries are not included in the package.